Lily Collins joined Hollywood's most stylish at the CFDA/Vogue Fashion Fund dinner in Beverly Hills on Wednesday night.

For the fashionable feast, The Mortal Instruments: City of Bones starlet suited up in a black Altuzarra blazer with plunging neckline and sheer chiffon paneled skirt, which had her looking sophisticated and mature.

You'd never guess that she's only 24-years-old!!

Lily accessorized her look with a gold clutch, Gianvito Rossi for Altuzarra satin clogs, and styled her bob into sassy waves.

With looks like this, it's no wonder Zac Efron can't keep his hands off of her!